Marble Falls (known as Marble City from 1840–1883, Willcockson from 1883–1934 and Dogpatch from 1966–1997) is an unincorporated community in Newton County, Arkansas, United States. It lies along Arkansas's National Scenic 7 Byway between Harrison and Jasper. The Marble Falls Post Office is located in the parking lot of the now defunct theme park called Dogpatch USA. For a time, the town was known as Dogpatch to promote the theme park.
Marble Falls is part of the Harrison Micropolitan Statistical Area.
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